Skibbereen Driscolls/Donovans - to Deptford/Rotherhithe

Having just been put right on my G G grandfathers name I am now searching for John Driscoll b 1843 in Cork, a 1901 census had a John Driscoll, Dock labourer, in Convent of Mercy, Spitalfields and if this is him he came from Skibbereen.His mother was born in 1816 in Cork and she can be found in the 1851 Census in Deptford with 3 children, John, Mary and Helen all born in the 1840's in Ireland.She is listed as a widow and a beggar in the St Pauls parish. I tracked back to Skibbereen and in the Creagh records I found Margaret and Patrick Driscoll having 6 children, Anne, John, Ellen, Jane, Dennis and Mary. Many people were dying during this time because of the famine.The landlords were also clearing the land of its people and a mass diaspora occurred.If this is the right Margaret (address Lasalohirig)b 1816 then her parents could be James Donovan and Briget McCarthey.Patrick b 1815 could be the son of Denis Driscoll and Ellen Croston (address Ardagh). Any assistance in finding any other links to these families would be appreciated.I would like to confirm them in or out of my family tree.Thank you.